1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2004-2023 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <signal.h> 19 #include <stdlib.h> 20 #include <string.h> 21 22 extern void 23 keeper (int sig) 24 { 25 } 26 27 volatile long v1 = 0; 28 volatile long v2 = 0; 29 volatile long v3 = 0; 30 31 extern long 32 bowler (void) 33 { 34 /* Try to read address zero. Do it in a slightly convoluted way so 35 that more than one instruction is used. */ 36 return *(char *) (v1 + v2 + v3); 37 } 38 39 int 40 main () 41 { 42 static volatile int i; 43 44 struct sigaction act; 45 memset (&act, 0, sizeof act); 46 act.sa_handler = keeper; 47 sigaction (SIGSEGV, &act, NULL); 48 sigaction (SIGBUS, &act, NULL); 49 50 bowler (); 51 return 0; 52 } 53